Heat-exchangee



C. F. BRA UN.

HEAT EXCHANGER. APPLICATION men MAR. 13. 1919. 1,376,135.

RENEWED AUG. 20. I920.

Patented Apr. 26, 1921.

INVENTOR UM! E'Braun Id y 4% TORNEYSv CARL F. BBAUN, OF SAN FRANCISCO, CALIFORNIA.

HEAT-EXCI-IANGER.

specification of Letters Patent.

Patented .ltipr. 2&5, 13 21- Application filed March 13, 1919, Serial No. 282,258. Renewed August 20, 1920. Serial No. 404,957.

and particularly pertains to improvements in structures of the type shown in my patent entitled lleat exchanger, No. 1,284,868, hearing date of November 12m, 1918.

Due to the confined quarters in which heat exchangers are sometimes installed, it is desirable to provide the shell of a heat eX- changer with means whereby the tube nest may be readily removed from either end of the cizcl'uinger or inspected if desired. It is the principal object of this invention to provide a heat exchanger shell embodying such improvements. i

The invention consists of a central, cylindrical shell within which a heating element is mounted and which element ma be removed from either end of the shell by the removal of the heads bolted thereon.

The invention is illustrated by way of example in the accompanying drawings, in which- Figure 1 is a longitudinal, central section of the heat exchanger showing the details of its construction.

Fig. 2 is an end view in elevation further illustrating the arrangement of the intake and outlet pipes of the shell.

In the drawings. 10 indicates a cylindrical shell oi the same general construction as shown in my copending application entitled Peat exchanger. bearing Serial Number 253,811 and, filed Sept. 12th 1918. This shell is harmed with opposite bolting flanges 11 and 12 which circumscribe the ends thereof and are adapted to receive clamping bolts 13. Mounted within the shell is a heating element 14. This element is also disclosed in the copending application perviously referred to. and consists of a central rod 15 upon which a plurality of disk battle plates 16 are mounted. These plates are held in spaced relation to each other by spacing tubes 17. The spacing tubes have opposite wings 18 which are arranged to divide the shell 10 into two compartments. The plates 16 are perforated to receive a plurality of tubes 19 and also to allow circulating space around the tubes.

prising the tubes, the halite members 16, the

partition members 18 and the end sheets may be completely removed when desired. The tube sheet 21 is fitted with aremovable dome 22 which forms a chamber through which the ends of the various tubes may communicate. The portion of the heating element upon which the tube sheet 21 and the the dome 22 are mounted extends through the end of the shell 11 and is there covered by a cap 23 adapted to be bolted against the flange 12 by means or": the bolts 13. It will thus be evident that by removal of this cap the ends of all of the tubes will be completely exposed and may be inspect ed, or, it desirech-the dome 22 may be removed without obstruction from the shell. The opposite end of the heating element terminates flush with the end of the shell and a head member 24-. t may therefore abut against it as it is bolted to the flange 11 by the bolts 13. The head 24; is cylindrical and is formed with a small flange adapted to receive cap screws 25 which pass through the tube sheet 20 and thus attach the heating unit to this casting so that when the head is loosened the heating element be drawn out therewith. The end of the head 24 has a removable cover plate 26 held in position b cap screws 27. Due to the use this plate the tube sheet 20 may be readily inspected. It will be understood that the shell, is provided with the customary inlet and outlet connections 28 and 29 and that the head 24 will be provided with inlet and outlet pipes 30 and 31 by which a constant double circulation of fluids. may be effected around and through the heating element. A partition 24 is formed across the steam head 24land thus divides this member into two compartments agreeing with those on the opposite sides of wings 18. This separates the inlet and outlet pipes 30 and 31.

In the operation of the present invention the heat exchanger is assembled, as shown in Fig. 1, and may be caused to function in the ordinary manner, as set forth in the application previously mentioned. In the event that the heating element is to be in spected. this operation may be performed by removing the cap 23 and the dome-piece 22 to gain access to one end of the heating element or by removing the cover plate 26 to inspect the other end of the heating element. In case the heating element is to be removed from the shell 10, the bolts 13 are first uniastened and the head member with the completely assembled heating element drawn through the shell and out the opening over which the head member is normally fastened. If? it so happens that there is insultieient clearance for the removal of the heating element from this opening, the heating elerncnt is partially withdrawn from the shell and the cap screws removed to dis com 2 the tube sheet 20 from the channel member 24. It will then be possible, after removal the shell cap 23, to withdraw the heating element from that end the shell. Thus it will be seen that the installation of the heat exchanger is not limited by the particular clearance ali'orded at one end of the shell but is merely limited to clearance at either end ol? the shell sullicient to allow the complete withdrawal of the heating element from the shell. It will also be evident that the opposite ends of the heating elei'nent may be readily inspected without in any way molesting the heating element structure and by a simple and convenient operation.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

l, A heat exchanger comprising a shell, a tulnilar heating element detachably positioned therein, a head member adapted to close one end of the shell and to support one end of the heating element and a cover cap upon the opposite end of the shell within which the opposite end of the heating element is freely mounted.

2. A heat exchanger comprising cylindrical shell, fluid circulating connections therewith, a heating element slidably positioned within said shell and extending from one end thercoi, a cover cap sealing one end or? the shell and inclosing the e:-;tonding end oi? the heating element and an end head member to which the opposite end of the heating element is secured an d which in turn. closes the opposite end of shell.

A heat excl anger comprising a cylindrical shell, fluid circulating connections there- A heat exchanger assembly com irisin ular shell, a heating unit comprising a I urant o: tubes removabl oositione-c in: said shell, a head member adapted to close one Cit-Ll oi? the shell ant to support one one oi the heati unit, :1 d a c 1' zip upon the opposite en a f the shell which the opposite end of the heating unit is freely mounted.

5. In a heat exchanger, a shell ha g pen ends and of substantially uniform cross see on throughout, a nest of tubes mounted rein removable from either end ierc l, atube sheet on said tubes ilorming barri 1' between the shell chamber and incrior ot the tubes, means for removably seuring the tubes and sheet in position within theshell and independent end closi res remorably secured on the shell, one of said closures being imperlorate and completely surrounding one end said nest of tubes.

6. In a heat exchanger, a shell having open ends and of substantially uniform cross-section throughout, a nest of tubes mounted therein and removable from either end thereof, a tube sheet on said tubes forming a barrier between the shell chamber and interior of the tubes, means for rcmo'vably securing the tubes and sheet in position within the shell and heads removably secured the nds i. said shell,v one of sa d heads lt-eing provided with an internal flange to which the adjacent tube sheet is connected, whereby to entirely close the space between the tubes and shell.

In testimony whereof I hare hereunto set hand in the presence of a subscribing witness.

CARL F. BRAUN. Witness:

Jenn F. MILLER. 

